NP_jsobject.cpp   [plain text]

/*
 * Copyright (C) 2004 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
#include <NP_jsobject.h>

using namespace KJS;
using namespace KJS::Bindings;


static KJS::List listFromNPArray(KJS::ExecState *exec, NPObject **args, unsigned argCount)
{
    KJS::List aList;    
    return aList;
}

static NPObject *jsAllocate()
{
    return (NPObject *)malloc(sizeof(JavaScriptObject));
}

static void jsDeallocate (JavaScriptObject *obj)
{
    free (obj);
}

static NPClass _javascriptClass = { 
    1,
    jsAllocate, 
    (NPDeallocateFunctionPtr)jsDeallocate, 
    0,
    0,
    0,
    0,
    0,
    0,
};

static NPClass *javascriptClass = &_javascriptClass;
NPClass *NPScriptObjectClass = javascriptClass;

Identifier identiferFromNPIdentifier(NPIdentifier ident)
{
    const NPUTF8 *name = NPN_UTF8FromIdentifier (ident);
    NPUTF16 *methodName;
    unsigned int UTF16Length;
    
    convertUTF8ToUTF16 (name, -1, &methodName, &UTF16Length); // requires free() of returned memory.
    Identifier identifier ((const KJS::UChar*)methodName, UTF16Length);
    free ((void *)methodName);
    
    return identifier;
}

void NPN_Call (NPScriptObject *o, NPIdentifier ident, NPObject **args, unsigned argCount, NPScriptResultFunctionPtr resultCallback, void *resultContext)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 
    NPVariant resultVariant;
    
    // Lookup the function object.
    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    Value func = obj->imp->get (exec, identiferFromNPIdentifier(ident));
    Interpreter::unlock();

    if (func.isNull()) {
        NPN_InitializeVariantAsNull(&resultVariant);
    }
    else if ( func.type() == UndefinedType) {
        NPN_InitializeVariantAsUndefined(&resultVariant);
    }
    else {
        // Call the function object.
        ObjectImp *funcImp = static_cast<ObjectImp*>(func.imp());
        Object thisObj = Object(const_cast<ObjectImp*>(obj->imp));
        List argList = listFromNPArray(exec, args, argCount);
        Interpreter::lock();
        Value result = funcImp->call (exec, thisObj, argList);
        Interpreter::unlock();

        // Convert and return the result of the function call.
        convertValueToNPVariant(exec, result, &resultVariant);
    }
    
    resultCallback (&resultVariant, resultContext);
    
    NPN_ReleaseVariantValue (&resultVariant);
}

void NPN_Evaluate (NPScriptObject *o, NPString *s, NPScriptResultFunctionPtr resultCallback, void *resultContext)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 
    NPVariant resultVariant;

    ExecState *exec = obj->root->interpreter()->globalExec();
    Object thisObj = Object(const_cast<ObjectImp*>(obj->imp));
    
    Interpreter::lock();
    NPUTF16 *scriptString;
    unsigned int UTF16Length;
    convertNPStringToUTF16 (s, &scriptString, &UTF16Length);    // requires free() of returned memory.
    KJS::Value result = obj->root->interpreter()->evaluate(UString(), 0, UString((const UChar *)scriptString,UTF16Length)).value();
    Interpreter::unlock();
    
    free ((void *)scriptString);
    
    convertValueToNPVariant(exec, result, &resultVariant);

    resultCallback (&resultVariant, resultContext);

    NPN_ReleaseVariantValue (&resultVariant);
}

void NPN_GetProperty (NPScriptObject *o, NPIdentifier propertyName, NPScriptResultFunctionPtr resultCallback, void *resultContext)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 
    NPVariant resultVariant;

    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    Value result = obj->imp->get (exec, identiferFromNPIdentifier(propertyName));
    Interpreter::unlock();
    
    convertValueToNPVariant(exec, result, &resultVariant);
    
    resultCallback (&resultVariant, resultContext);

    NPN_ReleaseVariantValue (&resultVariant);
}

void NPN_SetProperty (NPScriptObject *o, NPIdentifier propertyName, const NPVariant *variant)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 

    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    obj->imp->put (exec, identiferFromNPIdentifier(propertyName), convertNPVariantToValue(exec, variant));
    Interpreter::unlock();
}

void NPN_RemoveProperty (NPScriptObject *o, NPIdentifier propertyName)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 

    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    obj->imp->deleteProperty (exec, identiferFromNPIdentifier(propertyName));
    Interpreter::unlock();
}

void NPN_ToString (NPScriptObject *o, NPScriptResultFunctionPtr resultCallback, void *resultContext)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 
    
    Interpreter::lock();
    Object thisObj = Object(const_cast<ObjectImp*>(obj->imp));
    ExecState *exec = obj->root->interpreter()->globalExec();
    
    NPVariant resultVariant;
    coerceValueToNPVariantStringType(exec, thisObj, &resultVariant);

    Interpreter::unlock();
    
    resultCallback (&resultVariant, resultContext);
    
    NPN_ReleaseVariantValue (&resultVariant);
}

void NPN_GetPropertyAtIndex (NPScriptObject *o, int32_t index, NPScriptResultFunctionPtr resultCallback, void *resultContext)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 

    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    Value result = obj->imp->get (exec, (unsigned)index);
    Interpreter::unlock();

    NPVariant resultVariant;
    convertValueToNPVariant(exec, result, &resultVariant);
    
    resultCallback (&resultVariant, resultContext);

    NPN_ReleaseVariantValue (&resultVariant);
}

void NPN_SetPropertyAtIndex (NPScriptObject *o, unsigned index, const NPVariant *value)
{
    JavaScriptObject *obj = (JavaScriptObject *)o; 

    ExecState *exec = obj->root->interpreter()->globalExec();
    Interpreter::lock();
    obj->imp->put (exec, (unsigned)index, convertNPVariantToValue(exec, value));
    Interpreter::unlock();
}